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Sicherheit: Ausführen von Code mit höheren Privilegien in X.Org
Aktuelle Meldungen Distributionen
Name: Ausführen von Code mit höheren Privilegien in X.Org
ID: USN-4905-1
Distribution: Ubuntu
Plattformen: Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 20.10
Datum: Di, 13. April 2021, 23:55
Referenzen: https://launchpad.net/ubuntu/+source/xorg-server-hwe-18.04/2:1.20.8-2ubuntu2.2~18.04.5
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3472
https://launchpad.net/ubuntu/+source/xorg-server-hwe-16.04/2:1.19.6-1ubuntu4.1~16.04.6
Applikationen: X11

Originalnachricht

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From: Marc Deslauriers <marc.deslauriers@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: "ubuntu-security-announce@lists.ubuntu.com"
<ubuntu-security-announce@lists.ubuntu.com>
Message-ID: <32211b30-3301-b4ba-d482-9542a612f8f7@canonical.com>
Subject: [USN-4905-1] X.Org X Server vulnerability

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==========================================================================
Ubuntu Security Notice USN-4905-1
April 13, 2021

xorg-server, xorg-server-hwe-16.04, xorg-server-hwe-18.04 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

X.Org X Server could be made to crash or run programs if it received
specially crafted input.

Software Description:
- xorg-server: X.Org X11 server
- xorg-server-hwe-18.04: X.Org X11 server
- xorg-server-hwe-16.04: X.Org X11 server

Details:

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
certain lengths of XInput extension ChangeFeedbackControl requests. An
attacker could use this issue to cause the server to crash, resulting in a
denial of service, or possibly execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
xserver-xorg-core 2:1.20.9-2ubuntu1.3

Ubuntu 20.04 LTS:
xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.2

Ubuntu 18.04 LTS:
xserver-xorg-core 2:1.19.6-1ubuntu4.9
xserver-xorg-core-hwe-18.04 2:1.20.8-2ubuntu2.2~18.04.5

Ubuntu 16.04 LTS:
xserver-xorg-core 2:1.18.4-0ubuntu0.12
xserver-xorg-core-hwe-16.04 2:1.19.6-1ubuntu4.1~16.04.6

After a standard system update you need to reboot your computer to make all
the necessary changes.

References:
https://ubuntu.com/security/notices/USN-4905-1
CVE-2021-3472

Package Information:
https://launchpad.net/ubuntu/+source/xorg-server/2:1.20.9-2ubuntu1.3
https://launchpad.net/ubuntu/+source/xorg-server/2:1.20.9-2ubuntu1.2~20.04.2
https://launchpad.net/ubuntu/+source/xorg-server/2:1.19.6-1ubuntu4.9

https://launchpad.net/ubuntu/+source/xorg-server-hwe-18.04/2:1.20.8-2ubuntu2.2~18.04.5
https://launchpad.net/ubuntu/+source/xorg-server/2:1.18.4-0ubuntu0.12

https://launchpad.net/ubuntu/+source/xorg-server-hwe-16.04/2:1.19.6-1ubuntu4.1~16.04.6


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